多段SSHの設定を.ssh/configにまとめる ref: http://qiita.com/ik-fib/items/12e4fab4478e360a82a1

config

host gateway
   HostName sshgate.hoge
   User hoge

host *-none
   ProxyCommand none

Host LocalB-*-out
   ProxyCommand ssh -W %h:%p Bgateway-out

Host LocalC-*-out
   ProxyCommand ssh -W %h:%p Cgateway-out

Host LocalB-*
   ProxyCommand ssh -W %h:%p Bgateway

Host LocalC-*
   ProxyCommand ssh -W %h:%p Cgateway

Host *-out
   ProxyCommand ssh -W %h:%p gateway

Host *RemoteHost*
  HostName RemoteHost
  User fuga

Host *Bgateway*
  HostName Bgateway
  User hogehoge

Host *Cgateway*
  HostName Cgateway
  User hogehoge

Host *HostA*
  HostName HostA
  User hogehoge

Host *HostB*
  HostName HostB
  User hogehoge

Host *HostC*
  HostName HostC
  User hogehoge

Host *HostD*
  HostName HostD
  User hogehoge

file0.txt

host gateway
   HostName sshgate.hoge
   User hoge

Host RemoteHost-out
  HostName RemoteHost
  User fuga
  ProxyCommand ssh -W %h:%p gateway

file1.txt

host gateway
   HostName sshgate.hoge
   User hoge

Host RemoteHost*
  HostName RemoteHost
  User fuga

host *-none
   ProxyCommand none

Host *-out*
   ProxyCommand ssh -W %h:%p gateway

file3.txt

Host LocalB-HostA-out HostA LocalB-HostA-out RemoteHost-out

Host gateway
…